<form action="validar_usuario.php" method="POST">
            Usuario:<input type="text" name="email" size="20" maxlength="20" /><br />
            Password:<input type="password" name="contra" size="10" maxlength="10" /><br />
            <input type="submit" value="Ingresar" />
        </form>
    </body>
</html>
